<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <div id="app">
        <h2>hello, {{message}}</h2>
        <!-- v-once:不随着页面的改变而改变 -->
        <h3 v-once>{{message}}</h3>  
    </div>

    <script src="../js/vue.js"></script>
    <script>
        const app = new Vue({
            el: '#app',
            data: {
                message: "重庆对外经贸学院!!"
            }
        })
    </script>
</body>

</html>